A model for gossip-mediated evolution of altruism with various types of false information by speakers and assessment by listeners.A model for gossip-mediated evolution of altruism with various types of false information by speakers and assessment by listeners.A model for gossip-mediated evolution of altruism with various types of false information by speakers and assessment by listeners.A model for gossip-mediated evolution of altruism with various types of false information by speakers and assessment by listeners.